Question

net模块有一个createServer函数，允许您创建网络包装器。这在Nodejs的本地运行时可以正常工作，但在Bluemix中运行时无法确定主机地址。服务器似乎已创建，但经过进一步检查，我发现server.address为空白。

var tls = require('tls');
var fs = require('fs');
var net = require('net');
var tunnelHost = (process.env.VCAP_APP_HOST || 'localhost');
var tunnelPort = 8888;
var server;
var gatewayOptions = {
    host: 'http://cap-sg-prd-5.integration.ibmcloud.com/',
    port: '15133',
    key: fs.readFileSync('key.pem'),
    cert: fs.readFileSync('cert.pem'),
    ca: fs.readFileSync('ca.pem')
};

console.log("starting createSecureTunnel");
//create a server end point to use as a network wrapper for the secure gateway
server = net.createServer(function (connListener){
    console.log('net server created');
    connListener.on('end', function() {
        console.log('client disconnected');
    });
    connListener.on('uncaughtException', function(err){
        console.log('exception caught:  ' + JSON.stringify(err));
    });
    //connect to farside, local/private server
    connectFarside(connListener, function(err, remoteSocket){
        if (err){
            console.log(err);
        }
        console.log('connection made');
        remoteSocket.pipe(connListener);
        console.log('remote socket connecte to local connListener');
        connListener.pipe(remoteSocket);
        console.log('local connListener connected to remote socket');
    });
});


//setup listener for network wrapper
server.listen(tunnelPort, tunnelHost, function(){
    console.log('tunnel created at: ' + tunnelHost +":"+ tunnelPort);  //.address +":"+ server.address().port);
});

//createa a TLS connection to the secure gateway
function connectFarside(conn, callback) {
    console.log("starting connectFarside");
    try {
        console.log("initiating farside connection");
        var socket = tls.connect(gatewayOptions, function(){
            console.log("tunnel connected to " + gatewayOptions.host +":"+ gatewayOptions.port);
            callback(null, socket);
        });
        socket.on("error", function(err){
            console.log("Socket error: " + JSON.stringify(err));
        });
    } catch(err) {
        console.log(err);
        callback(err);
    }
}

Answer 1

Bluemix为您的应用程序提供了一个可以运行的端口，这就是它在Bluemix中不起作用的原因。您开始使用以下代码行在端口8888上启动您的应用。

var tunnelPort = 8888;

应该改为

var tunnelPort = process.env.VCAP_APP_PORT || 8888;

上面一行将读取一个名为VCAP_PORT的环境变量，其中Bluemix为您的应用分配端口，如果它未运行Bluemix，它将在端口8888上运行。

您的应用可通过端口80和443通过网络访问。 Bluemix将为您的应用程序加载余额。

nodejs net.createServer函数在Bluemix中生成一个空白的server.address值

1 个答案: